EP0809928A1 - Cutting machine - Google Patents

Cutting machine Download PDF

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Publication number
EP0809928A1
EP0809928A1 EP97440046A EP97440046A EP0809928A1 EP 0809928 A1 EP0809928 A1 EP 0809928A1 EP 97440046 A EP97440046 A EP 97440046A EP 97440046 A EP97440046 A EP 97440046A EP 0809928 A1 EP0809928 A1 EP 0809928A1
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EP
European Patent Office
Prior art keywords
articulation
cutting machine
longitudinal axis
machine according
connecting member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97440046A
Other languages
German (de)
French (fr)
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EP0809928B1 (en
Inventor
Martin Walch
Bernard Wattron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kuhn SAS
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Kuhn SAS
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Publication date
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Publication of EP0809928A1 publication Critical patent/EP0809928A1/en
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Publication of EP0809928B1 publication Critical patent/EP0809928B1/en
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/64—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
    • A01D34/66—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle with two or more cutters
    • A01D34/661—Mounting means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S56/00—Harvesters
    • Y10S56/14—Hitch

Definitions

  • This known cutting machine basically comprises a coupling structure, a cutting mechanism, a suspension arm and a locking device.
  • the suspension arm is linked to the coupling structure by means of a first articulation of a longitudinal axis directed upwards so that it can be pivoted in a working position and in a transport position around said longitudinal axis. .
  • the suspension arm is also linked to the cutting mechanism by means of a second articulation with a substantially horizontal longitudinal axis so that said cutting mechanism can pivot around said longitudinal axis in order to be able to follow the terrain relief during work.
  • the locking device it is intended to lock, in the transport position, the pivoting of the cutting mechanism around the longitudinal axis of the second articulation and, to authorize, in the working position, said pivoting.
  • the locking device comprises a pivoting plate linked on the one hand to the cutting mechanism by means of an additional articulation of longitudinal axis parallel to the longitudinal axis of the second articulation and on the other hand to the arm of suspension by means of a link.
  • This connection consists of a groove comprising a first substantially vertical part and a second substantially horizontal part and orthogonal to the first part.
  • This connection additionally comprises a guide shaft fixed on the suspension arm, which guide shaft extends in the groove so that, in the working position, the first part of said groove can move on said guide shaft to allow the cutting mechanism to pivot around the longitudinal axis of the second joint.
  • the locking device is also provided with an actuating means linked on the one hand to the pivoting plate and on the other hand to the coupling structure so that, when the suspension arm and the cutting mechanism are pivoted in the transport position around the longitudinal axis of the first articulation, said actuating means acts on the pivoting plate to rotate it around the longitudinal axis of the additional articulation.
  • the second part of the groove is housed on the guide shaft allowing the cutting mechanism to be fixed to the suspension arm.
  • the actuating means ceases to act on the pivoting plate, which is returned to its working position where the first part of the groove can move on the guide shaft, by means of an elastic element.
  • a large part of the locking device, in particular the pivoting plate and the guide shaft, is located just above the cutting mechanism, between the latter and the suspension arm.
  • the actuating means of the locking device of this known cutting machine consists of a string, which is relaxed when it ceases to act on the pivoting plate in the working position.
  • the string When the string is relaxed, it dangles along the suspension arm in the direction of the ground, which may hinder the smooth running of operations. Indeed, this string may get caught in the fodder or in an animated element such as for example the wheel of the motor vehicle to which the cutting machine is coupled.
  • the string is subjected to fairly significant stresses, in particular when the motor vehicle to which the cutting machine is coupled passes through ruts, which risks breaking said string.
  • the object of the present invention is to remedy the drawbacks of the known cutting machine while ensuring that a simple and reliable cutting machine is produced.
  • Such a plant cutting machine is simple and reliable and does not have any elements which may hinder the smooth running of operations.
  • the cutting machine (1) as shown in FIGS. 1 to 5 is similar to the cutting machine described by document FR 96 03122. For further details, reference will be made, if necessary, to the text of said document. .
  • the cutting machine (1) is intended to cut and / or grind plants. It comprises a coupling structure (2) provided with two lower coupling points (3, 4) and an upper coupling point (5) by means of which said cutting machine (1) is linked to a vehicle motor (6).
  • a suspension arm (8) is linked to the coupling structure (2) by means of a first articulation (9) with a longitudinal axis (9a) at least substantially vertical.
  • a cutting mechanism (10) is linked to a second articulation (12) of longitudinal axis (12a) at least substantially horizontal and at least substantially parallel to the direction d working advance (13) when said cutting mechanism (10) is in the working position as shown in FIGS. 1 and 2.
  • an operating means (14) comprising a hydraulic cylinder (15) intended to pivot the suspension arm (8) and the cutting mechanism (10) from the working position to the transport position and vice versa. , around the longitudinal axis (9a) of the first articulation (9).
  • the cutting machine (1) is also provided with a transmission device (16) intended to drive the cutting mechanism (10), said transmission device (16) being itself driven by the motor vehicle (6).
  • the cutting machine (1) comprises a locking device (18).
  • This locking device (18) makes it possible, in the transport position, to lock the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12) and to authorize said pivoting in the job.
  • the locking device (18) comprises a connecting member (19) consisting, according to the example shown, of a rod (20) extending substantially parallel to the suspension arm (8) and above of it.
  • this rod (20) is rigid and is linked to one (21) of its ends (21, 22) to a lever mechanism (23) by means of a third articulation (25) comprising a geometric axis (25a) at least substantially parallel to the longitudinal axis (12a) of the second articulation (12).
  • the third articulation (25) is a spherical articulation making it possible to avoid excessive detrimental play in said articulation.
  • the lever mechanism (23) is additionally linked to the cutting mechanism (10). This lever mechanism (23) will be described in more detail later.
  • the rod (20) is linked to the coupling structure (2) by a connecting means (26) located higher than the first articulation (9).
  • the connecting means (26) comprises a fourth articulation (27) having a geometric axis (27a) directed upwards.
  • the geometric axis (27a) of the fourth articulation ( 27) is at least substantially coincident with the longitudinal axis (9a) of the first articulation (9).
  • the connecting means (26) also comprises a pin (28) with a longitudinal axis (28a) coincident with the geometric axis (27a) of the fourth articulation (27).
  • This pin (28) is linked to the rod (20) and extends through a guide device (29) linked to the coupling structure (2).
  • this guide device (29) is formed by a support (30) fixed to the coupling structure (2), in which a groove (32) is provided.
  • This groove (32) extends transversely to the direction of advance to work (13) and is at least substantially straight.
  • the longitudinal axis (32a) of the groove (32) extends at least substantially orthogonally to the direction of advance to work (13) and at least substantially horizontally above the first articulation (9).
  • the longitudinal axis (32a) of the groove (32) intersects at least substantially orthogonally the longitudinal axis (9a) of the first articulation (9).
  • the other end (22) of the rod (20) comprises two wings (33, 34) between which the support (30) of the device extends. guide (29).
  • the pin (28) extends right through through the two wings (33, 34) and through the groove (32) provided in the support (30).
  • the pin (28) is cylindrical and the groove (32) is an oblong hole (35) with a longitudinal axis (35a) coincident with the longitudinal axis (32a). of the groove (32).
  • the pin (28) and the oblong hole (35) are arranged so that, in the working position, said pin (28) can move in the following oblong hole (35) the longitudinal axis (35a) and, when placing in the transport position, said pin (28) can pivot around its longitudinal axis (28a).
  • the lever mechanism (23), to which the end (21) of the rod (20) is linked by means of the third articulation (25), is located between the cutting mechanism (10) and the suspension arm (8 ).
  • This lever mechanism (23) transforms the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12), into a substantially rectilinear movement, horizontal and transverse to the direction of advance at work (13) of the rod (20).
  • the lever mechanism (23) comprises a pivoting lever (36) with two branches (37, 38) and a connecting rod (40).
  • the pivoting lever (36) is linked, in its middle part, to the suspension arm (8) by means of a fifth articulation (41) with a longitudinal axis (4 la) at least substantially parallel to the longitudinal axis (12a ) of the second articulation (12).
  • the first branch (37) of the pivoting lever (36) is linked to the end (21) of the rod (20) by means of the third articulation (25) described above, while the second branch (38) of the pivoting lever (36) is linked to one (42) of the ends (42, 43) of the connecting rod (40) by means of a sixth articulation (44) with a longitudinal axis (44a) at least substantially parallel to the axis longitudinal (12a) of the second articulation (12).
  • the third articulation (25) is situated in the same vertical plane directed in the direction of advance to work (13) as the fifth articulation (41) .
  • Said third articulation (25) is situated above the fifth articulation (41), while the sixth articulation (44) is situated somewhat below said fifth articulation (41).
  • Said sixth articulation (44) is also located in a vertical plane directed on the one hand in the direction of advance to work (13) and implanted on the other hand between the fifth articulation (41) and the first articulation (9).
  • the connecting rod (40) is located between the pivoting lever (36) and the cutting mechanism (10). To this end, the connecting rod (40) is linked to the other (43) of its ends (42, 43) to the cutting mechanism (10) by means of a seventh articulation (45) with a longitudinal axis (45a) at least approximately parallel to the longitudinal axis (12a) of the second articulation (12).
  • This seventh articulation (45) is situated, as visible in FIG. 4, in the normal working position, on the one hand in a horizontal plane implanted below the sixth articulation (44) and on the other hand in a vertical plane implanted between said sixth articulation (44) and the fifth articulation (41).
  • the seventh articulation (45) is an elastic articulation which absorbs, in the working position as in the transport position, the various shocks to which the locking device (18) is subjected.
  • each stop (47, 48) is located in the vicinity of the connecting means (26). More specifically, each stop (47, 48) is formed by one end (49, 50) of the oblong hole (35).
  • the cutting machine (1) comprises a stabilizing device (51) intended to return the cutting mechanism (10) to a predetermined position when said cutting mechanism (10) is in position. working position.
  • the stabilizing device (51) is arranged in the locking device (18) and the predetermined position is the normal working position, that is to say that where the cutting mechanism (10) s' extends at least substantially horizontally.
  • the stabilizing device (51) comprises two elastic elements (53, 53 ') each located between the rod (20) and the suspension arm (8).
  • each elastic element (53, 53 ') is composed of a tension spring (54) with a longitudinal axis (54a) acting in opposite directions.
  • each tension spring (54) is linked at one of its ends to a common lug (55) fixed on the suspension arm (8) and, at the other end to a fastener (56, 57 ) respective fixed on the rod (20).
  • each tension spring (54) is tensioned so as to provide a certain initial stability to the cutting mechanism (10) in particular in the swath position (cutting mechanism (10) extending above cut or cut plants for headland maneuvers).
  • the longitudinal axes (54a) of the tension springs (54) are coincident and that the line of action (58) of said tension springs (54) is, in a view from the rear, in the working position, at least substantially parallel to a straight line (59) passing through the third and fourth articulation (25, 27) and, according to a top view, at least substantially coincident with said straight line (59).
  • tension springs (54) allows, in the transport position, to bring the pin (28) at least substantially in the middle of the oblong hole (35) to ensure perfect stability of the cutting mechanism (10).
  • the cutting machine (1) operates as follows: when the cutting machine (1) is in the transport position, as shown in Figures 3 and 5, the cutting mechanism (10) s 'extends above the ground (S) and with the suspension arm (8), at least substantially parallel to the direction of advance to work (13), behind the coupling structure (2).
  • the longitudinal axis (20a) of the rod (20) extends, in a top view, substantially orthogonally to the axis longitudinal (35a) of the oblong hole (35), which does not allow any displacement of said rod (20) relative to the hitching structure (2) and which has the effect of locking the second articulation (12) and fixing the cutting mechanism (10) to the suspension arm (8).
  • the operator When the operator wishes to bring the cutting machine (1) from the transport position to the working position, he actuates the operating means (14), which has the effect of pivoting the cutting mechanism (10) and the suspension arm (8) around the longitudinal axis (9a) of the first articulation (9) in the working position in which, they extend substantially orthogonally to the direction of advance to work (13).
  • the rod (20) pivots about the geometric axis (27a) of the fourth articulation (27) until it extends substantially orthogonally to the direction of advance to work (13).
  • the longitudinal axis (20a) of the rod (20) is substantially coincident with the longitudinal axis (35a) of the oblong hole (35), which allows the pin (28) to move in said oblong hole (35).
  • the operator lowers the cutting machine (1), so that the cutting mechanism (10) rests on the ground (S).
  • the cutting machine (1) is in the working position.
  • the operator actuates the transmission device (16) from the motor vehicle (6) in order to drive said cutting mechanism (10).
  • the cutting machine (1) is moved in a field covered with plants to be cut by means of the motor vehicle (6).
  • the cutting mechanism (10) can easily be adapted to the relief of the ground (S) by pivoting in particular around the longitudinal axis (12a) of the second articulation (12).
  • the connecting rod (40) linked to the cutting mechanism (10) acts on the pivoting lever (36), which pivots around the longitudinal axis (4 la) of the fifth articulation (41) which has the effect moving the rod (20) in a vertical plane containing the longitudinal axis (35a) of the oblong hole (35).
  • the pin (28) moves longitudinally in the oblong hole (35) within the limits authorized by these ends (49, 50).
  • the intensity of the action provided by the stabilizing device (51) is adjustable so as to be able to adapt the predetermined position of the cutting mechanism as a function of the distribution of the masses thereof.
  • it can for example be provided to move the fasteners (56, 57) along the rod (20).
  • the mechanism cutting (10) will maintain the predetermined working position in the transport position.
  • the cutting mechanism (10) will pivot around the longitudinal axis (12a) of the second joint ( 12) when placing the cutting machine (1) in the working or transport position, that is to say that said cutting mechanism (10) will occupy in the transport position, a position relative to the arm suspension (8) different from that of the working position.

Abstract

A crop cutter comprises a cutting unit (1) and a tractor (6). It also has a hitching system (2) and a cutting mechanism (10) which is connected to a suspension arm (8) by an articulated joint (12). The joint has a lengthwise horizontal axis (12a) in line with the direction of travel and a lock (18) to fix the position of the joint (12). The lock has a linking member (19) which is connected directly or indirectly to the cutting mechanism by an additional pivot (25) with its geometrical axis (25a) lying parallel to the axis (12a) of articulated joint (12). The additional pivot (25) is also connected by the linking member (19) and a connector (26) to the hitching system (2).

Description

La présente invention concerne une machine de coupe de végétaux comportant:

  • une structure d'attelage destinée à être liée à un véhicule moteur ;
  • un mécanisme de coupe s'étendant, lors du travail, transversalement à la direction d'avance au travail (position de travail) et, lors du transport, au moins sensiblement suivant la direction d'avance au travail (position de transport) ;
  • un bras de suspension lié d'une part à la structure d'attelage au moyen d'une première articulation d'axe longitudinal dirigé vers le haut et d'autre part au mécanisme de coupe au moyen d'une deuxième articulation d'axe longitudinal dirigé au moins sensiblement suivant la direction d'avance au travail lorsque ledit mécanisme de coupe est dans la position de travail ;
  • un dispositif de verrouillage permettant, en position de transport, de verrouiller le pivotement du mécanisme de coupe autour de l'axe longitudinal de la deuxième articulation, et comportant un organe de liaison lié d'une part directement ou indirectement au mécanisme de coupe et d'autre part à la structure d'attelage.
The present invention relates to a plant cutting machine comprising:
  • a coupling structure intended to be linked to a motor vehicle;
  • a cutting mechanism extending, during work, transversely to the direction of advance to work (working position) and, during transport, at least substantially along the direction of advance to work (transport position);
  • a suspension arm linked on the one hand to the coupling structure by means of a first articulation with a longitudinal axis directed upwards and on the other hand to the cutting mechanism by means of a second articulation with a longitudinal axis directed at least substantially in the direction of advance to work when said cutting mechanism is in the working position;
  • a locking device making it possible, in the transport position, to lock the pivoting of the cutting mechanism around the longitudinal axis of the second articulation, and comprising a connecting member connected on the one hand directly or indirectly to the cutting mechanism and d on the other hand to the coupling structure.

Une telle machine de coupe de végétaux est connue par le document EP-A-0 655 186.Such a plant cutting machine is known from document EP-A-0 655 186.

Cette machine de coupe connue comporte dans les grandes lignes une structure d'attelage, un mécanisme de coupe, un bras de suspension et un dispositif de verrouillage.This known cutting machine basically comprises a coupling structure, a cutting mechanism, a suspension arm and a locking device.

Le bras de suspension est lié à la structure d'attelage au moyen d'une première articulation d'axe longitudinal dirigé vers le haut de manière qu'il puisse être pivoté dans une position de travail et dans une position de transport autour dudit axe longitudinal.The suspension arm is linked to the coupling structure by means of a first articulation of a longitudinal axis directed upwards so that it can be pivoted in a working position and in a transport position around said longitudinal axis. .

Le bras de suspension est également lié au mécanisme de coupe au moyen d'une deuxième articulation d'axe longitudinal sensiblement horizontal de manière que ledit mécanisme de coupe puisse pivoter autour dudit axe longitudinal afin de pouvoir suivre le relief du terrain lors du travail.The suspension arm is also linked to the cutting mechanism by means of a second articulation with a substantially horizontal longitudinal axis so that said cutting mechanism can pivot around said longitudinal axis in order to be able to follow the terrain relief during work.

Le dispositif de verrouillage quant à lui est destiné à verrouiller, en position de transport, le pivotement du mécanisme de coupe autour de l'axe longitudinal de la deuxième articulation et, d'autoriser, en position de travail, ledit pivotement. A cet effet, le dispositif de verrouillage comporte une plaque pivotante liée d'une part au mécanisme de coupe au moyen d'une articulation supplémentaire d'axe longitudinal parallèle à l'axe longitudinal de la deuxième articulation et d'autre part au bras de suspension au moyen d'une liaison. Cette liaison se compose d'une rainure comportant une première partie sensiblement verticale et une deuxième partie sensiblement horizontale et orthogonale à la première partie. Cette liaison comporte en sus un arbre de guidage fixé sur le bras de suspension, lequel arbre de guidage s'étend dans la rainure de manière que, en position de travail, la première partie de ladite rainure puisse se déplacer sur ledit arbre de guidage pour autoriser le pivotement du mécanisme de coupe autour de l'axe longitudinal de la deuxième articulation.As for the locking device, it is intended to lock, in the transport position, the pivoting of the cutting mechanism around the longitudinal axis of the second articulation and, to authorize, in the working position, said pivoting. To this end, the locking device comprises a pivoting plate linked on the one hand to the cutting mechanism by means of an additional articulation of longitudinal axis parallel to the longitudinal axis of the second articulation and on the other hand to the arm of suspension by means of a link. This connection consists of a groove comprising a first substantially vertical part and a second substantially horizontal part and orthogonal to the first part. This connection additionally comprises a guide shaft fixed on the suspension arm, which guide shaft extends in the groove so that, in the working position, the first part of said groove can move on said guide shaft to allow the cutting mechanism to pivot around the longitudinal axis of the second joint.

Le dispositif de verrouillage est également doté d'un moyen d'actionnement lié d'une part à la plaque pivotante et d'autre part à la structure d'attelage de manière que, lorsque le bras de suspension et le mécanisme de coupe sont pivotés dans la position de transport autour de l'axe longitudinal de la première articulation, ledit moyen d'actionnement agit sur la plaque pivotante pour la faire pivoter autour de l'axe longitudinal de l'articulation supplémentaire. A cet effet, la deuxième partie de la rainure vient se loger sur l'arbre de guidage permettant de fixer le mécanisme de coupe au bras de suspension.The locking device is also provided with an actuating means linked on the one hand to the pivoting plate and on the other hand to the coupling structure so that, when the suspension arm and the cutting mechanism are pivoted in the transport position around the longitudinal axis of the first articulation, said actuating means acts on the pivoting plate to rotate it around the longitudinal axis of the additional articulation. To this end, the second part of the groove is housed on the guide shaft allowing the cutting mechanism to be fixed to the suspension arm.

Lorsque le bras de suspension et le mécanisme de coupe sont pivotés dans la position de travail, le moyen d'actionnement cesse d'agir sur la plaque pivotante, laquelle est rappelée dans sa position de travail où la première partie de la rainure peut se déplacer sur l'arbre de guidage, au moyen d'un élément élastique.When the suspension arm and the cutting mechanism are pivoted in the working position, the actuating means ceases to act on the pivoting plate, which is returned to its working position where the first part of the groove can move on the guide shaft, by means of an elastic element.

Une grande partie du dispositif de verrouillage, notamment la plaque pivotante et l'arbre de guidage, est implantée juste au-dessus du mécanisme de coupe, entre ce dernier et le bras de suspension.A large part of the locking device, in particular the pivoting plate and the guide shaft, is located just above the cutting mechanism, between the latter and the suspension arm.

Il est bien connu par l'homme du métier que la partie supérieure du mécanisme de coupe est particulièrement exposée aux végétaux ce qui risque de compromettre le bon fonctionnement du dispositif de verrouillage.It is well known to those skilled in the art that the upper part of the cutting mechanism is particularly exposed to plants, which risks compromising the proper functioning of the locking device.

En outre, le moyen d'actionnement du dispositif de verrouillage de cette machine de coupe connue est constitué d'une ficelle, laquelle est détendue lorsqu'elle cesse d'agir sur la plaque pivotante en position de travail. Lorsque la ficelle est détendue, elle pendille le long du bras de suspension en direction du sol, ce qui risque de gêner le bon déroulement des opérations. En effet, cette ficelle risque de se prendre dans le fourrage ou dans un élément animé comme par exemple la roue du véhicule moteur auquel la machine de coupe est attelée. En sus, lorsque la machine de coupe est transportée, la ficelle est soumise à des contraintes assez importantes, notamment lorsque le véhicule moteur auquel est attelée la machine de coupe passe dans des ornières, ce qui risque de rompre ladite ficelle.In addition, the actuating means of the locking device of this known cutting machine consists of a string, which is relaxed when it ceases to act on the pivoting plate in the working position. When the string is relaxed, it dangles along the suspension arm in the direction of the ground, which may hinder the smooth running of operations. Indeed, this string may get caught in the fodder or in an animated element such as for example the wheel of the motor vehicle to which the cutting machine is coupled. In addition, when the cutting machine is transported, the string is subjected to fairly significant stresses, in particular when the motor vehicle to which the cutting machine is coupled passes through ruts, which risks breaking said string.

La conception de ce dispositif de verrouillage connu est relativement fragile ce qui risque d'entraîner des coûts assez conséquents.The design of this known locking device is relatively fragile, which risks entailing fairly substantial costs.

Le but de la présente invention est de remédier aux inconvénients de la machine de coupe connue tout en veillant à réaliser une machine de coupe simple et fiable.The object of the present invention is to remedy the drawbacks of the known cutting machine while ensuring that a simple and reliable cutting machine is produced.

A cet effet, la machine de coupe de végétaux est caractérisée en ce que l'organe de liaison est lié directement ou indirectement au mécanisme de coupe au moyen d'une troisième articulation présentant un axe géométrique au moins sensiblement parallèle à l'axe longitudinal de la deuxième articulation et, qu'il est prévu un moyen de liaison solidaire de la structure d'attelage :

  • permettant, en position de travail, un déplacement de l'organe de liaison par rapport à la structure d'attelage, et
  • interdisant, en position de transport, un déplacement de l'organe de liaison par rapport à la structure d'attelage.
To this end, the plant cutting machine is characterized in that the connecting member is connected directly or indirectly to the cutting mechanism by means of a third articulation having a geometric axis at least substantially parallel to the longitudinal axis of the second articulation and, that there is provided a connecting means integral with the coupling structure:
  • allowing, in the working position, a displacement of the connecting member with respect to the coupling structure, and
  • prohibiting, in the transport position, a movement of the connecting member relative to the coupling structure.

Une telle machine de coupe de végétaux est simple et fiable et ne présente pas d'éléments qui risquent de gêner le bon déroulement des opérations.Such a plant cutting machine is simple and reliable and does not have any elements which may hinder the smooth running of operations.

L'invention concerne également les caractéristiques suivantes considérées isolément ou dans toutes leurs combinaisons techniquement possibles :

  • l'organe de liaison est lié à la structure d'attelage à l'aide du moyen de liaison lequel:
    • permet, en position de travail un déplacement de l'organe de liaison par rapport à la structure d'attelage transversalement à la direction d'avance au travail ; et
    • interdit, en position de transport, un déplacement de l'organe de liaison par rapport à la structure d'attelage suivant la direction d'avance au travail.
  • le moyen de liaison liant l'organe de liaison à la structure d'attelage comporte une quatrième articulation présentant un axe géométrique dirigé vers le haut ;
  • en position normale de travail (mécanisme de coupe s'étendant horizontalement), l'axe géométrique de la quatrième articulation est au moins sensiblement confondu avec l'axe longitudinal de la première articulation ; un tel agencement permet de pivoter le mécanisme de coupe et le bras de suspension de la position de travail dans la position de transport ou inversement, autour de l'axe longitudinal de la première articulation sans varier la position relative de l'organe de liaison par rapport au bras de suspension et également sans varier la position relative du mécanisme de coupe par rapport audit bras de suspension ; un tel agencement permet notamment de conserver une position sensiblement horizontale du mécanisme de coupe dans la position de transport ce qui présente l'avantage, lors du transport de la machine de coupe, de conserver sensiblement la même garde au sol dans la position andain (mécanisme de coupe s'étendant transversalement à la direction d'avance au travail et au-dessus du sol);
  • le moyen de liaison liant l'organe de liaison à la structure d'attelage comporte un tourillon lié à l'organe de liaison et s'étendant au travers d'un dispositif de guidage lié à la structure d'attelage ;
  • le dispositif de guidage comporte une rainure s'étendant transversalement à la direction d'avance au travail ;
  • la rainure est au moins sensiblement rectiligne ;
  • l'axe longitudinal de la rainure s'étend au moins sensiblement orthogonalement à la direction d'avance au travail et au moins sensiblement horizontalement ; un tel positionnement de la rainure permet, en position de travail, à l'organe de liaison de se déplacer transversalement à la direction d'avance au travail et interdit, en position de transport, audit organe de liaison un déplacement représentatif ;
  • l'axe longitudinal de la rainure coupe l'axe longitudinal de la première articulation ;
  • l'axe longitudinal de la rainure coupe au moins sensiblement orthogonalement l'axe longitudinal de la première articulation ;
  • le pivotement du mécanisme de coupe autour de l'axe longitudinal de la deuxième articulation est limité dans chaque sens par une butée ;
  • les butées sont implantées dans le voisinage du moyen de liaison liant l'organe de liaison à la structure d'attelage ;
  • les butées sont formées par les deux extrémités de la rainure ;
  • il est prévu un mécanisme à levier implanté entre le mécanisme de coupe et le bras de suspension, l'organe de liaison étant lié audit mécanisme à levier ;
  • le mécanisme à levier comporte un levier pivotant à deux branches :
    • qui est lié, dans sa partie médiane au bras de suspension au moyen d'une cinquième articulation d'axe longitudinal au moins sensiblement parallèle à l'axe longitudinal de la deuxième articulation ;
    • dont la première branche est liée à l'organe de liaison au moyen de la troisième articulation ; et
    • dont la deuxième branche est liée directement ou indirectement au mécanisme de coupe ; un tel agencement permet de transformer le pivotement du mécanisme de coupe autour de l'axe longitudinal de la deuxième articulation en un mouvement sensiblement rectiligne de l'organe de liaison ;
  • le mécanisme à levier comporte en sus une bielle implantée entre le levier pivotant et le mécanisme de coupe, ladite bielle étant liée d'une part au levier pivotant au moyen d'une sixième articulation et d'autre part au mécanisme de coupe au moyen d'une septième articulation, les axes longitudinaux desdites sixième et septième articulations étant au moins sensiblement parallèles à l'axe longitudinal de la deuxième articulation ;
  • la septième articulation est une articulation élastique ;
  • la machine de coupe de végétaux comporte un dispositif stabilisateur destiné à rappeler le mécanisme de coupe dans une position prédéterminée lorsque ledit mécanisme de coupe se trouve en position de travail ; un tel dispositif stabilisateur permet en sus, lors des manoeuvres en bout de parcelle, lorsque le mécanisme de coupe est suspendu transversalement à la direction d'avance au travail au-dessus du sol au moyen du bras de suspension, de maintenir ledit mécanisme de coupe dans la position prédéterminée ;
  • la position prédéterminée est la position normale de travail, c'est-à-dire celle où le mécanisme de coupe s'étend au moins sensiblement horizontalement;
  • le dispositif stabilisateur comporte deux éléments élastiques agissant dans des sens contraires ;
  • chaque élément élastique est implanté entre l'organe de liaison et le bras de suspension ;
  • l'intensité de l'action fournie par le dispositif stabilisateur est réglable ;
  • l'organe de liaison s'étend au-dessus du bras de suspension ; une telle position dudit organe de liaison permet avantageusement de le mettre à l'abri des végétaux pour ne pas compromettre le bon fonctionnement du dispositif de verrouillage ;
  • l'organe de liaison est constitué d'une tringle s'étendant au moins sensiblement parallèlement au bras de suspension.
The invention also relates to the following characteristics considered in isolation or in all their technically possible combinations:
  • the connecting member is linked to the coupling structure using the connecting means which:
    • allows, in the working position a movement of the connecting member relative to the coupling structure transversely to the direction of advance to work; and
    • prohibits, in the transport position, a movement of the connecting member relative to the coupling structure in the direction of advance to work.
  • the connecting means connecting the connecting member to the coupling structure comprises a fourth articulation having a geometric axis directed upwards;
  • in the normal working position (cutting mechanism extending horizontally), the geometric axis of the fourth articulation is at least substantially coincident with the longitudinal axis of the first articulation; such an arrangement enables the cutting mechanism and the suspension arm to be pivoted from the working position to the transport position or vice versa, around the longitudinal axis of the first articulation without varying the relative position of the connecting member by relative to the suspension arm and also without varying the relative position of the cutting mechanism with respect to said suspension arm; such an arrangement makes it possible in particular to keep a substantially horizontal position of the cutting mechanism in the transport position, which has the advantage, when transporting the cutting machine, of keeping substantially the same ground clearance in the swath position (mechanism cutting extending transversely to the direction of work advance and above the ground);
  • the connecting means connecting the connecting member to the coupling structure comprises a pin connected to the connecting member and extending through a guide device linked to the coupling structure;
  • the guide device comprises a groove extending transversely to the direction of advance to work;
  • the groove is at least substantially straight;
  • the longitudinal axis of the groove extends at least substantially orthogonally to the direction of advance to work and at least substantially horizontally; such positioning of the groove allows, in the working position, the connecting member to move transversely to the direction of advance to work and prohibits, in the transport position, to said connecting member a representative movement;
  • the longitudinal axis of the groove intersects the longitudinal axis of the first articulation;
  • the longitudinal axis of the groove cuts at least substantially orthogonally the longitudinal axis of the first articulation;
  • the pivoting of the cutting mechanism around the longitudinal axis of the second articulation is limited in each direction by a stop;
  • the stops are located in the vicinity of the connecting means connecting the connecting member to the coupling structure;
  • the stops are formed by the two ends of the groove;
  • there is provided a lever mechanism located between the cutting mechanism and the suspension arm, the connecting member being linked to said lever mechanism;
  • the lever mechanism comprises a pivoting lever with two branches:
    • which is connected in its middle part to the suspension arm by means of a fifth articulation with a longitudinal axis at least substantially parallel to the longitudinal axis of the second articulation;
    • the first branch of which is linked to the connecting member by means of the third articulation; and
    • the second branch of which is linked directly or indirectly to the cutting mechanism; such an arrangement makes it possible to transform the pivoting of the cutting mechanism around the longitudinal axis of the second articulation in a substantially rectilinear movement of the connecting member;
  • the lever mechanism further comprises a connecting rod located between the pivoting lever and the cutting mechanism, said connecting rod being linked on the one hand to the pivoting lever by means of a sixth articulation and on the other hand to the cutting mechanism by means of 'a seventh articulation, the longitudinal axes of said sixth and seventh articulations being at least substantially parallel to the longitudinal axis of the second articulation;
  • the seventh joint is an elastic joint;
  • the plant cutting machine comprises a stabilizing device intended to return the cutting mechanism to a predetermined position when said cutting mechanism is in the working position; such a stabilizing device makes it possible, in addition, during maneuvers at the end of the plot, when the cutting mechanism is suspended transversely to the direction of advance to work above the ground by means of the suspension arm, to maintain said cutting mechanism in the predetermined position;
  • the predetermined position is the normal working position, that is to say that where the cutting mechanism extends at least substantially horizontally;
  • the stabilizing device comprises two elastic elements acting in opposite directions;
  • each elastic element is located between the connecting member and the suspension arm;
  • the intensity of the action provided by the stabilizing device is adjustable;
  • the connecting member extends above the suspension arm; such a position of said connecting member advantageously makes it possible to shelter it from plants so as not to compromise the proper functioning of the locking device;
  • the connecting member consists of a rod extending at least substantially parallel to the suspension arm.

D'autres objets et caractéristiques de l'invention ressortiront de la description ci-après, avec référence aux dessins annexés qui représentent, à titre d'exemple non limitatif, une forme de réalisation de la machine de coupe selon l'invention.Other objects and characteristics of the invention will emerge from the description below, with reference to the appended drawings which represent, by way of nonlimiting example, an embodiment of the cutting machine according to the invention.

Sur ces dessins :

  • la figure 1 représente, en position de travail, une machine de coupe selon l'invention vue de l'arrière et liée à un véhicule moteur ;
  • la figure 2 représente la machine de coupe de la figure 1, vue de dessus ;
  • la figure 3 représente la machine de coupe de la figure 1, en position de transport selon une vue de dessus ;
  • la figure 4 représente un agrandissement partiel de la figure 1 ;
  • la figure 5 représente un agrandissement partiel de la figure 3.
In these drawings:
  • FIG. 1 represents, in the working position, a cutting machine according to the invention seen from the rear and linked to a motor vehicle;
  • Figure 2 shows the cutting machine of Figure 1, top view;
  • Figure 3 shows the cutting machine of Figure 1, in the transport position in a top view;
  • Figure 4 shows a partial enlargement of Figure 1;
  • FIG. 5 represents a partial enlargement of FIG. 3.

La machine de coupe (1) telle que représentée sur les figures 1 à 5 est semblable à la machine de coupe décrite par le document FR 96 03122. Pour de plus amples détails, on se reportera, en cas de besoin, au texte dudit document.The cutting machine (1) as shown in FIGS. 1 to 5 is similar to the cutting machine described by document FR 96 03122. For further details, reference will be made, if necessary, to the text of said document. .

La machine de coupe (1), telle que représentée sur les figures 1 à 3, est destinée à couper et/ou broyer des végétaux. Elle comporte une structure d'attelage (2) munie de deux points d'attelage inférieurs (3, 4) et d'un point d'attelage supérieur (5) au moyen desquels ladite machine de coupe (1) est liée à un véhicule moteur (6). A la structure d'attelage (2) est lié un bras de suspension (8) au moyen d'une première articulation (9) d'axe longitudinal (9a) au moins sensiblement vertical. A l'extrémité du bras de suspension (8) est lié un mécanisme de coupe (10) au moyen d'une deuxième articulation (12) d'axe longitudinal (12a) au moins sensiblement horizontal et au moins sensiblement parallèle à la direction d'avance au travail (13) lorsque ledit mécanisme de coupe (10) est dans la position de travail tel que représentée sur les figures 1 et 2.The cutting machine (1), as shown in Figures 1 to 3, is intended to cut and / or grind plants. It comprises a coupling structure (2) provided with two lower coupling points (3, 4) and an upper coupling point (5) by means of which said cutting machine (1) is linked to a vehicle motor (6). A suspension arm (8) is linked to the coupling structure (2) by means of a first articulation (9) with a longitudinal axis (9a) at least substantially vertical. At the end of the suspension arm (8) is linked a cutting mechanism (10) by means of a second articulation (12) of longitudinal axis (12a) at least substantially horizontal and at least substantially parallel to the direction d working advance (13) when said cutting mechanism (10) is in the working position as shown in FIGS. 1 and 2.

En position de travail, le mécanisme de coupe (10) s'étend transversalement à la direction d'avance au travail (13) et repose sur le sol (S), en position de transport, au moins sensiblement suivant ladite direction d'avance au travail (13). A cet effet, est prévu un moyen de manoeuvre (14) comportant un vérin hydraulique (15) destiné à pivoter le bras de suspension (8) et le mécanisme de coupe (10) de la position de travail dans la position de transport et inversement, autour de l'axe longitudinal (9a) de la première articulation (9).In the working position, the cutting mechanism (10) extends transversely to the direction of advance to work (13) and rests on the ground (S), in the transport position, at least substantially in said direction of advance. at work (13). For this purpose, there is provided an operating means (14) comprising a hydraulic cylinder (15) intended to pivot the suspension arm (8) and the cutting mechanism (10) from the working position to the transport position and vice versa. , around the longitudinal axis (9a) of the first articulation (9).

La machine de coupe (1) est également dotée d'un dispositif de transmission (16) destiné à entraîner le mécanisme de coupe (10), ledit dispositif de transmission (16) étant lui-même entraîné par le véhicule moteur (6).The cutting machine (1) is also provided with a transmission device (16) intended to drive the cutting mechanism (10), said transmission device (16) being itself driven by the motor vehicle (6).

On remarquera en outre que la machine de coupe (1) comporte un dispositif de verrouillage (18). Ce dispositif de verrouillage (18) permet, en position de transport, de verrouiller le pivotement du mécanisme de coupe (10) autour de l'axe longitudinal (12a) de la deuxième articulation (12) et d'autoriser ledit pivotement en position de travail. A cet effet, le dispositif de verrouillage (18) comporte un organe de liaison (19) constitué, selon l'exemple représenté, d'une tringle (20) s'étendant sensiblement parallèlement au bras de suspension (8) et au-dessus de celui-ci. Selon l'exemple représenté, cette tringle (20) est rigide et, est liée à l'une (21) de ses extrémités (21, 22) à un mécanisme à levier (23) au moyen d'une troisième articulation (25) comportant un axe géométrique (25a) au moins sensiblement parallèle à l'axe longitudinal (12a) de la deuxième articulation (12). Selon l'exemple représenté, la troisième articulation (25) est une articulation sphérique permettant d'éviter un jeu excessif préjudiciable dans ladite articulation. On notera que le mécanisme à levier (23) est en sus lié au mécanisme de coupe (10). Ce mécanisme à levier (23) sera décrit plus en détail ultérieurement.It will also be noted that the cutting machine (1) comprises a locking device (18). This locking device (18) makes it possible, in the transport position, to lock the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12) and to authorize said pivoting in the job. To this end, the locking device (18) comprises a connecting member (19) consisting, according to the example shown, of a rod (20) extending substantially parallel to the suspension arm (8) and above of it. According to the example shown, this rod (20) is rigid and is linked to one (21) of its ends (21, 22) to a lever mechanism (23) by means of a third articulation (25) comprising a geometric axis (25a) at least substantially parallel to the longitudinal axis (12a) of the second articulation (12). According to the example shown, the third articulation (25) is a spherical articulation making it possible to avoid excessive detrimental play in said articulation. Note that the lever mechanism (23) is additionally linked to the cutting mechanism (10). This lever mechanism (23) will be described in more detail later.

A l'autre extrémité (22), la tringle (20) est liée à la structure d'attelage (2) par un moyen de liaison (26) situé plus haut que la première articulation (9).At the other end (22), the rod (20) is linked to the coupling structure (2) by a connecting means (26) located higher than the first articulation (9).

Le moyen de liaison (26) :

  • permet, en position de travail, un déplacement de ladite tringle (20) par rapport à la structure d'attelage (2) transversalement à la direction d'avance au travail (13), et
  • interdit, en position de transport, un déplacement de ladite tringle (20) par rapport à la structure d'attelage (2) suivant la direction d'avance au travail (13).
The connecting means (26):
  • allows, in the working position, a displacement of said rod (20) relative to the coupling structure (2) transversely to the direction of advance to work (13), and
  • prohibits, in the transport position, a movement of said rod (20) relative to the coupling structure (2) in the direction of advance to work (13).

Le moyen de liaison (26) comporte une quatrième articulation (27) présentant un axe géométrique (27a) dirigé vers le haut. En position normale de travail (mécanisme de coupe (10) s'étendant transversalement à la direction d'avance au travail (13) et reposant horizontalement sur le sol (S)), l'axe géométrique (27a) de la quatrième articulation (27) est au moins sensiblement confondu avec l'axe longitudinal (9a) de la première articulation (9).The connecting means (26) comprises a fourth articulation (27) having a geometric axis (27a) directed upwards. In the normal working position (cutting mechanism (10) extending transversely to the direction of advance to work (13) and resting horizontally on the ground (S)), the geometric axis (27a) of the fourth articulation ( 27) is at least substantially coincident with the longitudinal axis (9a) of the first articulation (9).

Le moyen de liaison (26) comporte également un tourillon (28) d'axe longitudinal (28a) confondu avec l'axe géométrique (27a) de la quatrième articulation (27). Ce tourillon (28) est lié à la tringle (20) et s'étend au travers d'un dispositif de guidage (29) lié à la structure d'attelage (2). Selon l'exemple représenté, ce dispositif de guidage (29) est formé par un support (30) fixé à la structure d'attelage (2), dans lequel est prévue une rainure (32). Cette rainure (32) s'étend transversalement à la direction d'avance au travail (13) et est au moins sensiblement rectiligne. Plus précisément, l'axe longitudinal (32a) de la rainure (32) s'étend au moins sensiblement orthogonalement à la direction d'avance au travail (13) et au moins sensiblement horizontalement au-dessus de la première articulation (9). On remarquera en outre que l'axe longitudinal (32a) de la rainure (32) coupe au moins sensiblement orthogonalement l'axe longitudinal (9a) de la première articulation (9).The connecting means (26) also comprises a pin (28) with a longitudinal axis (28a) coincident with the geometric axis (27a) of the fourth articulation (27). This pin (28) is linked to the rod (20) and extends through a guide device (29) linked to the coupling structure (2). According to the example shown, this guide device (29) is formed by a support (30) fixed to the coupling structure (2), in which a groove (32) is provided. This groove (32) extends transversely to the direction of advance to work (13) and is at least substantially straight. More specifically, the longitudinal axis (32a) of the groove (32) extends at least substantially orthogonally to the direction of advance to work (13) and at least substantially horizontally above the first articulation (9). It will also be noted that the longitudinal axis (32a) of the groove (32) intersects at least substantially orthogonally the longitudinal axis (9a) of the first articulation (9).

A la lumière des figures 4 et 5, on voit de manière plus précise que l'autre extrémité (22) de la tringle (20) comporte deux ailes (33, 34) entre lesquelles s'étend le support (30) du dispositif de guidage (29). Le tourillon (28) s'étend de part en part au travers des deux ailes (33, 34) et au travers de la rainure (32) prévue dans le support (30). A cet effet, selon l'exemple de réalisation représenté, le tourillon (28) est de forme cylindrique et la rainure (32) est un trou oblong (35) d'axe longitudinal (35a) confondu avec l'axe longitudinal (32a) de la rainure (32). Le tourillon (28) et le trou oblong (35) sont agencés de manière que, en position de travail, ledit tourillon (28) peut se déplacer dans le trou oblong (35) suivant l'axe longitudinal (35a) et, lors de la mise en position de transport, ledit tourillon (28) peut pivoter autour de son axe longitudinal (28a).In the light of FIGS. 4 and 5, it can be seen more precisely that the other end (22) of the rod (20) comprises two wings (33, 34) between which the support (30) of the device extends. guide (29). The pin (28) extends right through through the two wings (33, 34) and through the groove (32) provided in the support (30). To this end, according to the embodiment shown, the pin (28) is cylindrical and the groove (32) is an oblong hole (35) with a longitudinal axis (35a) coincident with the longitudinal axis (32a). of the groove (32). The pin (28) and the oblong hole (35) are arranged so that, in the working position, said pin (28) can move in the following oblong hole (35) the longitudinal axis (35a) and, when placing in the transport position, said pin (28) can pivot around its longitudinal axis (28a).

Le mécanisme à levier (23), auquel est liée l'extrémité (21) de la tringle (20) au moyen de la troisième articulation (25), est implanté entre le mécanisme de coupe (10) et le bras de suspension (8). Ce mécanisme à levier (23) transforme le pivotement du mécanisme de coupe (10) autour de l'axe longitudinal (12a) de la deuxième articulation (12), en un déplacement sensiblement rectiligne, horizontal et transversal à la direction d'avance au travail (13) de la tringle (20). A cet effet, le mécanisme à levier (23) comporte un levier pivotant (36) à deux branches (37, 38) et une bielle (40).The lever mechanism (23), to which the end (21) of the rod (20) is linked by means of the third articulation (25), is located between the cutting mechanism (10) and the suspension arm (8 ). This lever mechanism (23) transforms the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12), into a substantially rectilinear movement, horizontal and transverse to the direction of advance at work (13) of the rod (20). To this end, the lever mechanism (23) comprises a pivoting lever (36) with two branches (37, 38) and a connecting rod (40).

Le levier pivotant (36) est lié, dans sa partie médiane, au bras de suspension (8) au moyen d'une cinquième articulation (41) d'axe longitudinal (4 la) au moins sensiblement parallèle à l'axe longitudinal (12a) de la deuxième articulation (12). La première branche (37) du levier pivotant (36) est liée à l'extrémité (21) de la tringle (20) au moyen de la troisième articulation (25) décrite précédemment, alors que la deuxième branche (38) du levier pivotant (36) est liée à l'une (42) des extrémités (42, 43) de la bielle (40) au moyen d'une sixième articulation (44) d'axe longitudinal (44a) au moins sensiblement parallèle à l'axe longitudinal (12a) de la deuxième articulation (12). A la lumière de la figure 4, on voit que, en position normale de travail, la troisième articulation (25) est située dans un même plan vertical dirigé suivant la direction d'avance au travail (13) que la cinquième articulation (41). Ladite troisième articulation (25) est située au-dessus de la cinquième articulation (41), alors que la sixième articulation (44) est située quelque peu en dessous de ladite cinquième articulation (41). Ladite sixième articulation (44) est également située dans un plan vertical dirigé d'une part suivant la direction d'avance au travail (13) et implanté d'autre part entre la cinquième articulation (41) et la première articulation (9).The pivoting lever (36) is linked, in its middle part, to the suspension arm (8) by means of a fifth articulation (41) with a longitudinal axis (4 la) at least substantially parallel to the longitudinal axis (12a ) of the second articulation (12). The first branch (37) of the pivoting lever (36) is linked to the end (21) of the rod (20) by means of the third articulation (25) described above, while the second branch (38) of the pivoting lever (36) is linked to one (42) of the ends (42, 43) of the connecting rod (40) by means of a sixth articulation (44) with a longitudinal axis (44a) at least substantially parallel to the axis longitudinal (12a) of the second articulation (12). In light of FIG. 4, it can be seen that, in the normal working position, the third articulation (25) is situated in the same vertical plane directed in the direction of advance to work (13) as the fifth articulation (41) . Said third articulation (25) is situated above the fifth articulation (41), while the sixth articulation (44) is situated somewhat below said fifth articulation (41). Said sixth articulation (44) is also located in a vertical plane directed on the one hand in the direction of advance to work (13) and implanted on the other hand between the fifth articulation (41) and the first articulation (9).

La bielle (40) est implantée entre le levier pivotant (36) et le mécanisme de coupe (10). A cet effet, la bielle (40) est liée à l'autre (43) de ses extrémités (42, 43) au mécanisme de coupe (10) au moyen d'une septième articulation (45) d'axe longitudinal (45a) au moins sensiblement parallèle à l'axe longitudinal (12a) de la deuxième articulation (12). Cette septième articulation (45) est située, tel que visible sur la figure 4, en position normale de travail, d'une part dans un plan horizontal implanté en dessous de la sixième articulation (44) et d'autre part dans un plan vertical implanté entre ladite sixième articulation (44) et la cinquième articulation (41).The connecting rod (40) is located between the pivoting lever (36) and the cutting mechanism (10). To this end, the connecting rod (40) is linked to the other (43) of its ends (42, 43) to the cutting mechanism (10) by means of a seventh articulation (45) with a longitudinal axis (45a) at least approximately parallel to the longitudinal axis (12a) of the second articulation (12). This seventh articulation (45) is situated, as visible in FIG. 4, in the normal working position, on the one hand in a horizontal plane implanted below the sixth articulation (44) and on the other hand in a vertical plane implanted between said sixth articulation (44) and the fifth articulation (41).

Selon l'exemple représenté, la septième articulation (45) est une articulation élastique qui amortie, en position de travail comme en position de transport, les différents chocs auxquels est soumis le dispositif de verrouillage (18).According to the example shown, the seventh articulation (45) is an elastic articulation which absorbs, in the working position as in the transport position, the various shocks to which the locking device (18) is subjected.

Selon une vue de dessus de la machine de coupe (1), en position normale de travail telle que représentée sur la figure 2, on voit que la cinquième articulation (41) et la sixième articulation (44) sont sensiblement situées dans un même plan vertical transversal, de préférence sensiblement orthogonal à la direction d'avance au travail (13), alors que la troisième articulation (25) est située devant ledit plan et la septième articulation (45) est située derrière ledit plan.According to a top view of the cutting machine (1), in the normal working position as shown in Figure 2, we see that the fifth joint (41) and the sixth joint (44) are substantially located in the same plane vertical transverse, preferably substantially orthogonal to the direction of advance to work (13), while the third joint (25) is located in front of said plane and the seventh joint (45) is located behind said plane.

On notera en outre que, en position de travail, le pivotement du mécanisme de coupe (10) autour de l'axe longitudinal (12a) de la deuxième articulation (12) est limité dans chaque sens par une butée (47, 48). Chaque butée (47, 48) est implantée dans le voisinage du moyen de liaison (26). Plus précisément, chaque butée (47, 48) est formée par une extrémité (49, 50) du trou oblong (35).It will also be noted that, in the working position, the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12) is limited in each direction by a stop (47, 48). Each stop (47, 48) is located in the vicinity of the connecting means (26). More specifically, each stop (47, 48) is formed by one end (49, 50) of the oblong hole (35).

Lorsque le mécanisme de coupe (10) pivote autour de l'axe longitudinal (12a) dans une des positions extrêmes (mécanisme de coupe (10) incliné au maximum par rapport au bras de suspension (8)), le tourillon (28) du moyen de liaison (26) est en appui sur l'extrémité (49, 50) correspondante du trou oblong (35).When the cutting mechanism (10) pivots about the longitudinal axis (12a) in one of the extreme positions (cutting mechanism (10) inclined as far as possible relative to the suspension arm (8)), the pin (28) of the connecting means (26) bears on the corresponding end (49, 50) of the oblong hole (35).

A la lumière des différentes figures, on voit encore que la machine de coupe (1) comporte un dispositif stabilisateur (51) destiné à rappeler le mécanisme de coupe (10) dans une position prédéterminée lorsque ledit mécanisme de coupe (10) se trouve en position de travail. Selon l'exemple représenté, le dispositif stabilisateur (51) est agencé au dispositif de verrouillage (18) et la position prédéterminée est la position normale de travail, c'est-à-dire celle où le mécanisme de coupe (10) s'étend au moins sensiblement horizontalement.In the light of the various figures, it can also be seen that the cutting machine (1) comprises a stabilizing device (51) intended to return the cutting mechanism (10) to a predetermined position when said cutting mechanism (10) is in position. working position. According to the example shown, the stabilizing device (51) is arranged in the locking device (18) and the predetermined position is the normal working position, that is to say that where the cutting mechanism (10) s' extends at least substantially horizontally.

Le dispositif stabilisateur (51) comporte deux éléments élastiques (53, 53') implantés chacun entre la tringle (20) et le bras de suspension (8). Selon l'exemple de réalisation représenté, chaque élément élastique (53, 53') est composé par un ressort de traction (54) d'axe longitudinal (54a) agissant dans des sens contraires. A cet effet, chaque ressort de traction (54) est lié à l'une des ses extrémités à une patte commune (55) fixée sur le bras de suspension (8) et, à l'autre extrémité à une attache (56, 57) respective fixée sur la tringle (20).The stabilizing device (51) comprises two elastic elements (53, 53 ') each located between the rod (20) and the suspension arm (8). According to the embodiment shown, each elastic element (53, 53 ') is composed of a tension spring (54) with a longitudinal axis (54a) acting in opposite directions. To this end, each tension spring (54) is linked at one of its ends to a common lug (55) fixed on the suspension arm (8) and, at the other end to a fastener (56, 57 ) respective fixed on the rod (20).

L'une (56) des attaches (56, 57) est située entre la patte commune (55) et l'autre extrémité (22) de la tringle (20) liée à la structure d'attelage (2) par le moyen de liaison (26). L'autre attache (57) est située entre la patte commune (55) et l'extrémité (21) de la tringle (20) liée au mécanisme à levier (23). On notera en sus que, en position normale de travail, chaque ressort de traction (54) est tendu de manière à procurer une certaine stabilité initiale au mécanisme de coupe (10) notamment en position andain (mécanisme de coupe (10) s'étendant au-dessus des végétaux coupés ou à couper pour les manoeuvres en bout de champs). On remarquera que les axes longitudinaux (54a) des ressorts de traction (54) sont confondus et que la droite d'action (58) desdits ressorts de traction (54) est, selon une vue de l'arrière, en position de travail, au moins sensiblement parallèle à une droite (59) passant par la troisième et la quatrième articulation (25, 27) et, selon une vue de dessus, au moins sensiblement confondu avec ladite droite (59).One (56) of the fasteners (56, 57) is located between the common tab (55) and the other end (22) of the rod (20) linked to the hitching structure (2) by means of link (26). The other fastener (57) is located between the common tab (55) and the end (21) of the rod (20) linked to the lever mechanism (23). It will also be noted that, in the normal working position, each tension spring (54) is tensioned so as to provide a certain initial stability to the cutting mechanism (10) in particular in the swath position (cutting mechanism (10) extending above cut or cut plants for headland maneuvers). It will be noted that the longitudinal axes (54a) of the tension springs (54) are coincident and that the line of action (58) of said tension springs (54) is, in a view from the rear, in the working position, at least substantially parallel to a straight line (59) passing through the third and fourth articulation (25, 27) and, according to a top view, at least substantially coincident with said straight line (59).

Un tel agencement des ressorts de traction (54) permet, en position de transport, de ramener le tourillon (28) au moins sensiblement au milieu du trou oblong (35) pour assurer une parfaite stabilité du mécanisme de coupe (10).Such an arrangement of the tension springs (54) allows, in the transport position, to bring the pin (28) at least substantially in the middle of the oblong hole (35) to ensure perfect stability of the cutting mechanism (10).

La machine de coupe (1) selon la présente invention fonctionne de la manière suivante : lorsque la machine de coupe (1) est dans la position de transport, telle que représentée sur les figures 3 et 5, le mécanisme de coupe (10) s'étend au-dessus du sol (S) et avec le bras de suspension (8), au moins sensiblement parallèlement à la direction d'avance au travail (13), derrière la structure d'attelage (2).The cutting machine (1) according to the present invention operates as follows: when the cutting machine (1) is in the transport position, as shown in Figures 3 and 5, the cutting mechanism (10) s 'extends above the ground (S) and with the suspension arm (8), at least substantially parallel to the direction of advance to work (13), behind the coupling structure (2).

Dans cette position de transport, l'axe longitudinal (20a) de la tringle (20) s'étend, selon une vue de dessus, sensiblement orthogonalement à l'axe longitudinal (35a) du trou oblong (35), ce qui ne permet aucun déplacement de ladite tringle (20) par rapport à la structure d'attelage (2) et qui a pour effet de condamner la deuxième articulation (12) et de fixer le mécanisme de coupe (10) au bras de suspension (8).In this transport position, the longitudinal axis (20a) of the rod (20) extends, in a top view, substantially orthogonally to the axis longitudinal (35a) of the oblong hole (35), which does not allow any displacement of said rod (20) relative to the hitching structure (2) and which has the effect of locking the second articulation (12) and fixing the cutting mechanism (10) to the suspension arm (8).

Lorsque l'opérateur souhaite amener la machine de coupe (1) de la position de transport dans la position de travail, il actionne le moyen de manoeuvre (14), ce qui a pour effet de faire pivoter le mécanisme de coupe (10) et le bras de suspension (8) autour de l'axe longitudinal (9a) de la première articulation (9) dans la position de travail dans laquelle, ils s'étendent sensiblement orthogonalement à la direction d'avance au travail (13). Lors de ce pivotement la tringle (20) pivote autour de l'axe géométrique (27a) de la quatrième articulation (27) jusqu'à ce qu'elle s'étende sensiblement orthogonalement à la direction d'avance au travail (13). Dans cette position, l'axe longitudinal (20a) de la tringle (20) est sensiblement confondu avec l'axe longitudinal (35a) du trou oblong (35), ce qui permet au tourillon (28) de se déplacer dans ledit trou oblong (35). Ensuite, l'opérateur abaisse la machine de coupe (1), de manière à faire reposer le mécanisme de coupe (10) sur le sol (S). La machine de coupe (1) est en position de travail. Puis, l'opérateur actionne le dispositif de transmission (16) à partir du véhicule moteur (6) afin d'entraîner ledit mécanisme de coupe (10).When the operator wishes to bring the cutting machine (1) from the transport position to the working position, he actuates the operating means (14), which has the effect of pivoting the cutting mechanism (10) and the suspension arm (8) around the longitudinal axis (9a) of the first articulation (9) in the working position in which, they extend substantially orthogonally to the direction of advance to work (13). During this pivoting the rod (20) pivots about the geometric axis (27a) of the fourth articulation (27) until it extends substantially orthogonally to the direction of advance to work (13). In this position, the longitudinal axis (20a) of the rod (20) is substantially coincident with the longitudinal axis (35a) of the oblong hole (35), which allows the pin (28) to move in said oblong hole (35). Then, the operator lowers the cutting machine (1), so that the cutting mechanism (10) rests on the ground (S). The cutting machine (1) is in the working position. Then, the operator actuates the transmission device (16) from the motor vehicle (6) in order to drive said cutting mechanism (10).

Lors du travail, la machine de coupe (1) est mue dans un champ couvert de végétaux à couper au moyen du véhicule moteur (6). Le mécanisme de coupe (10) peut aisément s'adapter au relief du sol (S) en pivotant notamment autour de l'axe longitudinal (12a) de la deuxième articulation (12). A cet effet, la bielle (40) liée au mécanisme de coupe (10) agit sur le levier pivotant (36), lequel pivote autour de l'axe longitudinal (4 la) de la cinquième articulation (41) ce qui a pour effet de déplacer la tringle (20) dans un plan vertical contenant l'axe longitudinal (35a) du trou oblong (35). Lors du déplacement de la tringle (20), le tourillon (28) se déplace longitudinalement dans le trou oblong (35) dans les limites autorisées par ces extrémités (49, 50). Lorsque la tringle (20) se déplace, un des ressorts de traction (54) à tendance à se détendre alors que l'autre ressort de traction se tend davantage ce qui a pour effet de toujours vouloir rappeler le mécanisme de coupe (10) dans la position de travail prédéterminée. Un tel agencement permet avantageusement de rigidifier le pivotement du mécanisme de coupe (10) autour de l'axe longitudinal (12a) de la deuxième articulation (12) notamment en position andain lorsque ledit mécanisme de coupe (10) s'étend au-dessus des végétaux coupés ou à couper lors des manoeuvres en bout de champs.During work, the cutting machine (1) is moved in a field covered with plants to be cut by means of the motor vehicle (6). The cutting mechanism (10) can easily be adapted to the relief of the ground (S) by pivoting in particular around the longitudinal axis (12a) of the second articulation (12). To this end, the connecting rod (40) linked to the cutting mechanism (10) acts on the pivoting lever (36), which pivots around the longitudinal axis (4 la) of the fifth articulation (41) which has the effect moving the rod (20) in a vertical plane containing the longitudinal axis (35a) of the oblong hole (35). When the rod (20) is moved, the pin (28) moves longitudinally in the oblong hole (35) within the limits authorized by these ends (49, 50). When the rod (20) moves, one of the tension springs (54) tends to relax while the other tension spring tends more which has the effect of always wanting to recall the cutting mechanism (10) in the predetermined working position. Such an arrangement advantageously makes it possible to stiffen the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12) in particular in the swath position when said cutting mechanism (10) extends above cut or to be cut plants during headland maneuvers.

Lorsque l'opérateur souhaite amener la machine de coupe (1) de la position de travail dans la position de transport, il coupe l'entraînement du mécanisme de coupe (10), soulève ce dernier au-dessus du sol (S) et actionne le moyen de manoeuvre (14) pour pivoter ledit mécanisme de coupe (10) et le bras de suspension (8) autour de l'axe longitudinal (9a) de la première articulation (9) jusque dans la position de transport.When the operator wishes to bring the cutting machine (1) from the working position to the transport position, he cuts the drive of the cutting mechanism (10), lifts it off the ground (S) and activates the operating means (14) for pivoting said cutting mechanism (10) and the suspension arm (8) about the longitudinal axis (9a) of the first articulation (9) as far as the transport position.

Finalement, différentes modifications restent possibles, notamment en ce qui concerne la constitution des divers éléments ou par substitution d'équivalents techniques, sans pour autant sortir du domaine de protection défini par les revendications.Finally, various modifications remain possible, in particular as regards the constitution of the various elements or by substitution of technical equivalents, without however departing from the field of protection defined by the claims.

Ainsi, il est parfaitement possible de prévoir que l'intensité de l'action fournie par le dispositif stabilisateur (51) soit réglable de manière à pouvoir adapter la position prédéterminée du mécanisme de coupe en fonction de la répartition des masses de celui-ci. A cet effet, il peut par exemple être prévu de déplacer les attaches (56, 57) le long de la tringle (20).Thus, it is perfectly possible to provide that the intensity of the action provided by the stabilizing device (51) is adjustable so as to be able to adapt the predetermined position of the cutting mechanism as a function of the distribution of the masses thereof. For this purpose, it can for example be provided to move the fasteners (56, 57) along the rod (20).

Il est également possible de réaliser un dispositif stabilisateur équipé de ressorts de compression. Ainsi, il est envisageable de disposer deux ressorts de compression l'un en face de l'autre, venant chacun d'une part en appui sur un support commun fixé sur le bras de suspension (8) et d'autre part sur un appui respectif solidaire de la tringle (20). Il peut également être prévu que l'axe longitudinal d'un ressort de compression soit confondu avec l'axe longitudinal de l'autre ressort de compression et que les axes longitudinaux desdits ressorts soient confondus avec l'axe longitudinal (20a) de la tringle (20).It is also possible to produce a stabilizing device equipped with compression springs. Thus, it is conceivable to have two compression springs one opposite the other, each coming on the one hand to bear on a common support fixed on the suspension arm (8) and on the other hand on a support respective integral with the rod (20). Provision may also be made for the longitudinal axis of one compression spring to coincide with the longitudinal axis of the other compression spring and for the longitudinal axes of said springs to coincide with the longitudinal axis (20a) of the rod. (20).

Il est encore possible de prévoir un réglage de l'angle de pivotement du mécanisme de coupe (10) autour de l'axe longitudinal (12a) de la deuxième articulation (12). A cet effet, il est parfaitement envisageable de concevoir un dispositif de guidage muni d'une rainure de longueur variable.It is also possible to provide an adjustment of the pivoting angle of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12). To this end, it is perfectly conceivable to design a guide device provided with a groove of variable length.

Pour des raisons d'encombrement ou autre, il est encore concevable de situer la rainure (32) du dispositif de guidage (29) à un endroit autre que au-dessus de la première articulation (9).For reasons of space or the like, it is also conceivable to locate the groove (32) of the guide device (29) at a location other than above the first articulation (9).

Ainsi, selon une vue de dessus, en plaçant la rainure (32) orthogonalement à la direction d'avance au travail (13) sur une droite orientée à 45° par rapport à ladite direction d'avance au travail (13), le mécanisme de coupe (10) conservera la position prédéterminée de travail en position de transport. En plaçant la rainure (32) orthogonalement à la direction d'avance au travail (13) à un endroit autre que ceux décrits précédemment, le mécanisme de coupe (10) pivotera autour de l'axe longitudinal (12a) de la deuxième articulation (12) lors de la mise en position de travail ou de transport de la machine de coupe (1), c'est-à-dire que ledit mécanisme de coupe (10) occupera en position de transport, une position relative par rapport au bras de suspension (8) différente de celle de la position de travail.Thus, according to a top view, by placing the groove (32) orthogonally to the direction of advance to work (13) on a straight line oriented at 45 ° relative to said direction of advance to work (13), the mechanism cutting (10) will maintain the predetermined working position in the transport position. By placing the groove (32) orthogonally to the direction of work advance (13) at a location other than those described above, the cutting mechanism (10) will pivot around the longitudinal axis (12a) of the second joint ( 12) when placing the cutting machine (1) in the working or transport position, that is to say that said cutting mechanism (10) will occupy in the transport position, a position relative to the arm suspension (8) different from that of the working position.

Enfin, il est parfaitement concevable de réaliser le dispositif de verrouillage (18) et/ou le dispositif stabilisateur (51) sous une forme indépendante de la machine de coupe (1) représentée, de manière à pouvoir l' (les) adapter sous forme d'un ou plusieurs accessoires sur d'autres machines de coupe du même genre ou sur des machines quelconques.Finally, it is perfectly conceivable to produce the locking device (18) and / or the stabilizing device (51) in a form independent of the cutting machine (1) shown, so as to be able to adapt it (them) in the form one or more accessories on other cutting machines of the same kind or on any machines.

Claims (24)

Machine de coupe de végétaux comportant : - une structure d'attelage (2) destinée à être liée à un véhicule moteur (6) ; - un mécanisme de coupe (10) s'étendant, lors du travail, transversalement à la direction d'avance au travail (13) (position de travail) et, lors du transport, au moins sensiblement suivant la direction d'avance au travail (13) (position de transport) ; - un bras de suspension (8) lié d'une part à la structure d'attelage (2) au moyen d'une première articulation (9) d'axe longitudinal (9a) dirigé vers le haut et d'autre part au mécanisme de coupe (10) au moyen d'une deuxième articulation (12) d'axe longitudinal (12a) dirigé au moins sensiblement suivant la direction d'avance au travail (13) lorsque ledit mécanisme de coupe (10) est dans la position de travail ; - un dispositif de verrouillage (18) permettant, en position de transport, de verrouiller le pivotement du mécanisme de coupe (10) autour de l'axe longitudinal (12a) de la deuxième articulation (12), et comportant un organe de liaison (19) lié d'une part directement ou indirectement au mécanisme de coupe (10) et d'autre part à la structure d'attelage (2), caractérisée en ce que l'organe de liaison (19) est lié directement ou indirectement au mécanisme de coupe (10) au moyen d'une troisième articulation (25) présentant un axe géométrique (25a) au moins sensiblement parallèle à l'axe longitudinal (12a) de la deuxième articulation (12) et, qu'il est prévu un moyen de liaison (26) solidaire de la structure d'attelage (2): - permettant, en position de travail, un déplacement de l'organe de liaison (19) par rapport à la structure d'attelage (2), et - interdisant, en position de transport, un déplacement de l'organe de liaison (19) par rapport à la structure d'attelage (2). Plant cutting machine comprising: - a coupling structure (2) intended to be linked to a motor vehicle (6); - a cutting mechanism (10) extending, during work, transversely to the direction of advance to work (13) (working position) and, during transport, at least substantially in the direction of advance to work (13) (transport position); - a suspension arm (8) linked on the one hand to the coupling structure (2) by means of a first articulation (9) with a longitudinal axis (9a) directed upwards and on the other hand to the mechanism cutting (10) by means of a second articulation (12) of longitudinal axis (12a) directed at least substantially in the direction of advance to work (13) when said cutting mechanism (10) is in the position of job ; - a locking device (18) making it possible, in the transport position, to lock the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12), and comprising a connecting member ( 19) connected on the one hand directly or indirectly to the cutting mechanism (10) and on the other hand to the coupling structure (2), characterized in that the connecting member (19) is connected directly or indirectly to the cutting mechanism (10) by means of a third articulation (25) having a geometric axis (25a) at least substantially parallel to the longitudinal axis (12a) of the second articulation (12) and, that there is provided a connecting means (26) integral with the coupling structure (2): - allowing, in the working position, a displacement of the connecting member (19) relative to the coupling structure (2), and - prohibiting, in the transport position, a movement of the connecting member (19) relative to the coupling structure (2). Machine de coupe de végétaux selon la revendication 1, caractérisée en ce que l'organe de liaison (19) est lié à la structure d'attelage (2) à l'aide du moyen de liaison (26) lequel : - permet, en position de travail, un déplacement de l'organe de liaison (19) par rapport à la structure d'attelage (2) transversalement à la direction d'avance au travail (13), et - interdit, en position de transport, un déplacement de l'organe de liaison (19) par rapport à la structure d'attelage (2) suivant la direction d'avance au travail (13). Plant cutting machine according to claim 1, characterized in that the connecting member (19) is linked to the coupling structure (2) by means of the connecting means (26) which: - allows, in the working position, a movement of the connecting member (19) relative to the coupling structure (2) transversely to the direction of advance to work (13), and - Prohibits, in the transport position, a movement of the connecting member (19) relative to the coupling structure (2) in the direction of advance to work (13). Machine de coupe de végétaux selon la revendication 1 ou 2, caractérisée en ce que le moyen de liaison (26) liant l'organe de liaison (19) à la structure d'attelage (2) comporte une quatrième articulation (27) présentant un axe géométrique (27a) dirigé vers le haut.Plant cutting machine according to claim 1 or 2, characterized in that the connecting means (26) connecting the connecting member (19) to the coupling structure (2) comprises a fourth articulation (27) having a geometric axis (27a) directed upwards. Machine de coupe de végétaux selon la revendication 3, caractérisée en ce que, en position normale de travail (mécanisme de coupe (10) s'étendant horizontalement), l'axe géométrique (27a) de la quatrième articulation (27) est au moins sensiblement confondu avec l'axe longitudinal (9a) de la première articulation (9).Plant cutting machine according to claim 3, characterized in that, in the normal working position (cutting mechanism (10) extending horizontally), the geometric axis (27a) of the fourth articulation (27) is at least substantially coincident with the longitudinal axis (9a) of the first articulation (9). Machine de coupe de végétaux selon la revendication 3 ou 4, caractérisée en ce que le moyen de liaison (26) liant l'organe de liaison (19) à la structure d'attelage (2) comporte un tourillon (28) lié à l'organe de liaison (19) et s'étendant au travers d'un dispositif de guidage (29) lié à la structure d'attelage (2).Plant cutting machine according to claim 3 or 4, characterized in that the connecting means (26) connecting the connecting member (19) to the coupling structure (2) comprises a pin (28) linked to the 'connecting member (19) and extending through a guide device (29) connected to the coupling structure (2). Machine de coupe de végétaux selon la revendication 5, caractérisée en ce que le dispositif de guidage (29) comporte une rainure (32) s'étendant transversalement à la direction d'avance au travail (13).Plant cutting machine according to claim 5, characterized in that the guide device (29) has a groove (32) extending transversely to the direction of advance to work (13). Machine de coupe de végétaux selon la revendication 6, caractérisée en ce que la rainure (32) est au moins sensiblement rectiligne.Plant cutting machine according to claim 6, characterized in that the groove (32) is at least substantially straight. Machine de coupe de végétaux selon la revendication 7, caractérisée en ce que l'axe longitudinal (32a) de la rainure (32) s'étend au moins sensiblement orthogonalement à la direction d'avance au travail (13) et au moins sensiblement horizontalement.Plant cutting machine according to claim 7, characterized in that the longitudinal axis (32a) of the groove (32) extends at least substantially orthogonally to the direction of advance to work (13) and at least substantially horizontally . Machine de coupe de végétaux selon la revendication 8, caractérisée en ce que l'axe longitudinal (32a) de la rainure (32) coupe l'axe longitudinal (9a) de la première articulation (9).Plant cutting machine according to claim 8, characterized in that the longitudinal axis (32a) of the groove (32) intersects the longitudinal axis (9a) of the first articulation (9). Machine de coupe de végétaux selon la revendication 9, caractérisée en ce que l'axe longitudinal (32a) de la rainure (32) coupe au moins sensiblement orthogonalement l'axe longitudinal (9a) de la première articulation (9).Plant cutting machine according to claim 9, characterized in that the longitudinal axis (32a) of the groove (32) cuts at least substantially orthogonally the longitudinal axis (9a) of the first articulation (9). Machine de coupe de végétaux selon l'une quelconque des revendications 1 à 10, caractérisée en ce que le pivotement du mécanisme de coupe (10) autour de l'axe longitudinal (12a) de la deuxième articulation (12) est limité dans chaque sens par une butée (47, 48).Plant cutting machine according to any one of Claims 1 to 10, characterized in that the pivoting of the cutting mechanism (10) around the longitudinal axis (12a) of the second articulation (12) is limited in each direction by a stop (47, 48). Machine de coupe de végétaux selon la revendication 11, caractérisée en ce que les butées (47, 48) sont implantées dans le voisinage du moyen de liaison (26) liant l'organe de liaison (19) à la structure d'attelage (2).Plant cutting machine according to claim 11, characterized in that the stops (47, 48) are located in the vicinity of the connecting means (26) connecting the connecting member (19) to the coupling structure (2 ). Machine de coupe de végétaux selon la revendication 12 dans sa dépendance à la revendication 6, caractérisée en ce que les butées (47, 48) sont formées par les deux extrémités (49, 50) de la rainure (32).Plant cutting machine according to claim 12 in its dependence on claim 6, characterized in that the stops (47, 48) are formed by the two ends (49, 50) of the groove (32). Machine de coupe de végétaux selon l'une quelconque des revendications 1 à 13, caractérisée en ce qu'il est prévu un mécanisme à levier (23) implanté entre le mécanisme de coupe (10) et le bras de suspension (8), l'organe de liaison (19) étant lié audit mécanisme à levier (23).Plant cutting machine according to any one of claims 1 to 13, characterized in that there is provided a lever mechanism (23) implanted between the cutting mechanism (10) and the suspension arm (8), the connecting member (19) being linked to said lever mechanism (23). Machine de coupe de végétaux selon la revendication 14, caractérisée en ce que le mécanisme à levier (23) comporte un levier pivotant (36) à deux branches (37, 38) : - qui est lié, dans sa partie médiane, au bras de suspension (8) au moyen d'une cinquième articulation (41) d'axe longitudinal (41a) au moins sensiblement parallèle à l'axe longitudinal (12a) de la deuxième articulation (12); - dont la première branche (37) est liée à l'organe de liaison (19) au moyen de la troisième articulation (25) ; et - dont la deuxième branche (38) est liée directement ou indirectement au mécanisme de coupe (10). Plant cutting machine according to claim 14, characterized in that the lever mechanism (23) comprises a pivoting lever (36) with two branches (37, 38): - Which is linked, in its middle part, to the suspension arm (8) by means of a fifth articulation (41) of longitudinal axis (41a) at least substantially parallel to the longitudinal axis (12a) of the second articulation (12); - whose first branch (37) is linked to the connecting member (19) by means of the third articulation (25); and - whose second branch (38) is directly or indirectly linked to the cutting mechanism (10). Machine de coupe de végétaux selon la revendication 15, caractérisée en ce que le mécanisme à levier (23) comporte en sus une bielle (40) implantée entre le levier pivotant (36) et le mécanisme de coupe (10), ladite bielle (40) étant liée d'une part au levier pivotant (36) au moyen d'une sixième articulation d'axe longitudinal (44a) et d'autre part au mécanisme de coupe (10) au moyen d'une septième articulation (45) d'axe longitudinal (45a), lesdits axes longitudinaux (44a, 45a) étant au moins sensiblement parallèles à l'axe longitudinal (12a) de la deuxième articulation (12).Plant cutting machine according to claim 15, characterized in that the lever mechanism (23) additionally comprises a connecting rod (40) located between the pivoting lever (36) and the cutting mechanism (10), said connecting rod (40 ) being linked on the one hand to the pivoting lever (36) by means of a sixth articulation with a longitudinal axis (44a) and on the other hand to the cutting mechanism (10) by means of a seventh articulation (45) d longitudinal axis (45a), said longitudinal axes (44a, 45a) being at least substantially parallel to the longitudinal axis (12a) of the second articulation (12). Machine de coupe de végétaux selon la revendication 16, caractérisée en ce que la septième articulation (45) est une articulation élastique.Plant cutting machine according to claim 16, characterized in that the seventh articulation (45) is an elastic articulation. Machine de coupe de végétaux selon l'une quelconque des revendications 1 à 17, caractérisée en ce qu'elle comporte un dispositif stabilisateur (51) destiné à rappeler le mécanisme de coupe (10) dans une position prédéterminée, lorsque ledit mécanisme de coupe (10) se trouve en position de travail.Plant cutting machine according to any one of claims 1 to 17, characterized in that it comprises a stabilizing device (51) intended to return the cutting mechanism (10) to a predetermined position, when said cutting mechanism ( 10) is in the working position. Machine de coupe de végétaux selon la revendication 18, caractérisée en ce que ladite position prédéterminée est la position normale de travail, c'est-à-dire celle où le mécanisme de coupe (10) s'étend au moins sensiblement horizontalement.Plant cutting machine according to claim 18, characterized in that said predetermined position is the normal working position, that is to say that where the cutting mechanism (10) extends at least substantially horizontally. Machine de coupe de végétaux selon la revendication 18 ou 19, caractérisée en ce que le dispositif stabilisateur (51) comporte deux éléments élastiques (53, 53') agissant dans des sens contraires.Plant cutting machine according to claim 18 or 19, characterized in that the stabilizing device (51) comprises two elastic elements (53, 53 ') acting in opposite directions. Machine de coupe de végétaux selon la revendication 20, caractérisée en ce que chaque élément élastique (53, 53') est implanté entre l'organe de liaison (19) et le bras de suspension (8).Plant cutting machine according to claim 20, characterized in that each elastic element (53, 53 ') is located between the connecting member (19) and the suspension arm (8). Machine de coupe de végétaux selon l'une quelconque des revendications 18 à 21, caractérisée en ce que l'intensité de l'action fournie par le dispositif stabilisateur (51) est réglable.Plant cutting machine according to any one of claims 18 to 21, characterized in that the intensity of the action provided by the stabilizing device (51) is adjustable. Machine de coupe de végétaux selon l'une quelconque des revendications 1 à 22, caractérisée en ce que l'organe de liaison (19) s'étend au-dessus du bras de suspension (8).Plant cutting machine according to any one of claims 1 to 22, characterized in that the connecting member (19) extends above the suspension arm (8). Machine de coupe de végétaux selon l'une quelconque des revendications 1 à 23, caractérisée en ce que l'organe de liaison (19) est constitué d'une tringle (20) s'étendant au moins sensiblement parallèlement au bras de suspension (8).Plant cutting machine according to any one of claims 1 to 23, characterized in that the connecting member (19) consists of a rod (20) extending at least substantially parallel to the suspension arm (8 ).
EP97440046A 1996-05-28 1997-05-22 Cutting machine Expired - Lifetime EP0809928B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9606697A FR2749127B1 (en) 1996-05-28 1996-05-28 PLANT CUTTING MACHINE FOR BEING ATTACHED TO A MOTOR VEHICLE WITH A LOCKING DEVICE FOR THE CUTTING MECHANISM
FR9606697 1996-05-28

Publications (2)

Publication Number Publication Date
EP0809928A1 true EP0809928A1 (en) 1997-12-03
EP0809928B1 EP0809928B1 (en) 2002-08-07

Family

ID=9492574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97440046A Expired - Lifetime EP0809928B1 (en) 1996-05-28 1997-05-22 Cutting machine

Country Status (6)

Country Link
US (1) US5901537A (en)
EP (1) EP0809928B1 (en)
AT (1) ATE221718T1 (en)
DE (1) DE69714513T2 (en)
DK (1) DK0809928T3 (en)
FR (1) FR2749127B1 (en)

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EP1060650A1 (en) * 1999-06-17 2000-12-20 Kuhn S.A. Mowing machine
EP1131992A1 (en) * 2000-03-10 2001-09-12 Maschinenfabrik Bernard Krone GmbH Mowing machine
FR2881021A1 (en) 2005-01-26 2006-07-28 Kuhn Sa Sa Mower for use with tractor, has unfolding and folding device moving cutter bar from operation to transport configuration and vice-versa, and including double-acting jack positioned between tilting unit and connecting rod connected to bar

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FR2774853B1 (en) 1999-02-15 2001-02-16 Kuhn Sa CUTTING MEMBER FOR A CUTTING MACHINE, PARTICULARLY A MOWER
FR2791224B1 (en) 1999-03-24 2001-05-25 Kuhn Sa CUTTING DEVICE OF A CUTTING MACHINE, FOR EXAMPLE MOWER COMPRISING A DEVICE FOR DRIVING THE CUT PRODUCT
FR2792164B1 (en) 1999-04-16 2001-05-25 Kuhn Sa DEVICE FOR TREATING CUT FORAGE AND MOWER USING SUCH A TREATMENT DEVICE
FR2792161B1 (en) 1999-04-16 2001-05-25 Kuhn Sa CUTTING MACHINE COMPRISING A CUTTING DEVICE LINKED TO A CHASSIS BY MEANS OF AN IMPROVED CONNECTING DEVICE
FR2793379B1 (en) 1999-05-11 2001-07-06 Kuhn Sa ADAPTER FOR A TRACTOR HITCH BAR
FR2794206B1 (en) 1999-05-26 2001-07-06 Kuhn Sa PROCESS FOR ASSEMBLY / DISMANTLING AND AUTOMATICALLY ADJUSTING THE TENSION OF AN ENDLESS TRANSMISSION - AGRICULTURAL MACHINE USING SUCH A PROCESS
FR2823061B1 (en) 2001-04-06 2003-09-26 Kuhn Sa HARVESTING MACHINE WITH IMPROVED DRIVE DEVICE
FR2823637A1 (en) 2001-04-18 2002-10-25 Kuhn Sa AGRICULTURAL MOWER COMPRISING A MOUNTING MECHANISM
FR2823636A1 (en) 2001-04-18 2002-10-25 Kuhn Sa HAYMAKING MACHINE, IN PARTICULAR A MOWER WITH A SWATH-COLLAPSE DEVICE
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Also Published As

Publication number Publication date
EP0809928B1 (en) 2002-08-07
US5901537A (en) 1999-05-11
FR2749127B1 (en) 1998-08-07
DE69714513T2 (en) 2003-06-18
DK0809928T3 (en) 2002-11-18
FR2749127A1 (en) 1997-12-05
DE69714513D1 (en) 2002-09-12
ATE221718T1 (en) 2002-08-15

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